#include #include usi

#include #include using namespace std;int main() {\tint len, maxlen;\tstring s, ss;\tmaxlen = 0;\tdo {\t\tcin >> ss;\t\tlen = ss.length();\t\tif (ss[0] == '#')\t\t\tbreak;\t\tif (len > maxlen) {\t\t\ts = ss;\t\t\tmaxlen = len;\t\t}\t} while (true);\tcout << s << endl;\treturn 0;}

输入：

I

am

a

citizen

of

China

#

输出：_________